我正在寻找一个很好的JS片段来将时间戳(例如从Twitter API)转换为友好的用户友好相对时间(例如2秒前,一周前等).

有人愿意分享一些他们喜欢的方法(最好不要使用插件)吗？

我想知道之间是否存在差异（除了引擎兼容性和可选发生之外）

CHARINDEX (expressionToFind ,expressionToSearch [, start_location])

和

INSTR (string , substring [, position [, occurrence]])

谢谢。

在尝试在 Visual Studio for Mac Community (7.0.1 [build 24]) 上编译 Xamarin Forms (2.3.4.247) 项目时，我在编码一段时间后不断收到以下两个错误，任何有关导致该错误的原因以及如何修复的线索它？

/Users/PathToProjectRoot/packages/Xamarin.Forms.2.3.4.247/build/portable-win+net45+wp80+win81+wpa81+MonoAndroid10+Xamarin.iOS10+xamarinmac20/Xamarin.Forms.targets(3,3): Error MSB4061: The "XamlCTask" task could not be instantiated from "/Users/PathToProjectRoot/packages/Xamarin.Forms.2.3.4.247/build/portable-win+net45+wp80+win81+wpa81+MonoAndroid10+Xamarin.iOS10+xamarinmac20/Xamarin.Forms.Build.Tasks.dll". Could not load file or assembly 'Xamarin.Forms.Build.Tasks' or one of its dependencies (MSB4061) (ProjectName)
/Users/PathToProjectRoot/packages/Xamarin.Forms.2.3.4.247/build/portable-win+net45+wp80+win81+wpa81+MonoAndroid10+Xamarin.iOS10+xamarinmac20/Xamarin.Forms.targets(3,3): Error MSB4060: The "XamlCTask" task has been declared or used incorrectly, or failed during construction. Check the spelling of the task name and the assembly name. (MSB4060) (ProjectName)

我尝试过的

• 更新了所有软件包和 SDK。
• 清理/重建解决方案。
• 删除所有包，关闭 VS，重新打开并恢复所有包。
• 删除所有bin和obj文件夹以尝试重建。 …

如果我尝试更换或取消订单，我会收到一条消息 58=Conditionally Required Field Missing ，下一条消息包含 58=Invalid MsgType 以下日志：

换单（tgFZctx200U61是我这边的，FG是换的。）：

20170203-15:44:04.225 : 8=FIX.4.49=15135=G34=349=tgFZctx200U6152=20170203-15:44:04.22556=FG1=U6111=270071221=138=240=241=2700744=11640054=155=RTS-3.1760=20170203-18:44:04.20510=028
20170203-15:44:04.225 : 8=FIX.4.49=23235=849=FG56=tgFZctx200U6134=352=20170203-15:43:56.98137=572984433198=F:572984433526=$01$11=270071241=2700717=exec-201702031001027616150=E39=E55=RTS-3.17461=FXXXXX54=138=140=2151=114=06=060=19700101-00:00:00.00010=213
20170203-15:44:04.275 : 8=FIX.4.49=11535=j34=449=tgFZctx200U6152=20170203-15:44:04.27556=FG45=358=Conditionally Required Field Missing372=8380=510=065
20170203-15:44:04.275 : 8=FIX.4.49=33335=849=FG56=tgFZctx200U6134=452=20170203-15:43:56.98237=572984753198=F:572984753526=$01$11=270071241=27007453=1448=tgFZctx200U61447=C452=317=3355471052150=539=01=FZ00U6155=RTS-3.1754=138=240=244=116400.00000336=9291151=214=06=060=20170203-15:43:56.98920008=-922337203685372211120018=[51000-3355471052-0]10=100
20170203-15:44:04.285 : 8=FIX.4.49=10335=349=FG56=tgFZctx200U6134=552=20170203-15:43:57.03345=4371=372373=1158=Invalid MsgType372=810=164

取消订单：

20170203-15:26:19.178 : 8=FIX.4.49=15435=F34=349=tgFZctx200U6152=20170203-15:26:19.17856=FG11=270061237=57286383038=141=2700644=116470.0000054=155=RTS-3.1760=20170203-18:26:19.17810=013
20170203-15:26:19.188 : 8=FIX.4.49=20735=849=FG56=tgFZctx200U6134=352=20170203-15:26:11.92437=572863830198=F:572863830526=$01$11=270061241=2700617=exec-201702031001027615150=639=655=RTS-3.17461=FXXXXX54=138=140=2151=114=06=010=239
20170203-15:26:19.418 : 8=FIX.4.49=11535=j34=449=tgFZctx200U6152=20170203-15:26:19.41856=FG45=358=Conditionally Required Field Missing372=8380=510=070
20170203-15:26:19.418 : 8=FIX.4.49=33335=849=FG56=tgFZctx200U6134=452=20170203-15:26:11.92437=572863830198=F:572863830526=$01$11=270061241=27006453=1448=tgFZctx200U61447=C452=317=3354681208150=439=41=FZ00U6155=RTS-3.1754=138=140=244=116470.00000336=9291151=014=06=060=20170203-15:26:11.93120008=-922337203685267353520018=[51000-3354681208-0]10=080
20170203-15:26:19.418 : 8=FIX.4.49=10335=349=FG56=tgFZctx200U6134=552=20170203-15:26:12.16445=4371=372373=1158=Invalid MsgType372=810=161

最好的问候，米哈伊尔

我有以下（匿名）systemd 脚本，名为 tomcat-autostart.service，存储在“/usr/lib/systemd/system/tomcat-autostart.service”中

[Unit]
Description=Tomcat Autostart Script
Requires=var-www-projects.mount
After=var-www-projects.mount

[Service]
Type=forking
ExecStart=/usr/bin/tomcat-autostart start
ExecStop=/usr/bin/tomcat-autostart stop

[Install]
WantedBy=multi-user.target

运行后

sudo systemctl daemon-reload
sudo systemctl enable tomcat-autostart.service

我收到错误消息：

Failed to execute operation: Bad message

我还在 /var/log/messages 中得到以下输出

Feb 17 11:29:53 cheese systemd: [/usr/lib/systemd/system/tomcat-autostart.service:1] Assignment outside of section. Ignoring.
Feb 17 11:29:53 cheese systemd: tomcat-autostart.service lacks both ExecStart= and ExecStop= setting. Refusing.
Feb 17 11:29:53 cheese systemd: [/usr/lib/systemd/system/tomcat-autostart.service:1] Missing '='.
Feb 17 11:29:53 cheese systemd: [/usr/lib/systemd/system/tomcat-autostart.service:1] Missing '='.

我让它工作了一段时间，然后我在“[Unit]”行上方添加了一些注释，然后它停止工作了。然后我删除了注释，并且可能无意中修改了脚本中的其他内容，此后我无法让它再次运行。

它似乎以自己的矛盾为乐。第一条错误消息表明第一行有一个赋值（“[Unit]”），第三条错误消息表明该赋值缺少“=”符号。所以基本上，“[Unit]”是一个赋值，只不过它不是因为它缺少“=”符号。

搜索该问题已确定第二条错误消息是其他错误消息的直接原因。因为它忽略节标题，所以它永远不会读取 ExecStart 和 …

作为angular的初学者，我在尝试通过angular-cli构建我的应用程序时遇到了一个问题。

在遵循了本教程之后：

我的appModule看起来像：

...
providers: [
{ provide: HttpService, useFactory: (backend: XHRBackend, options:     RequestOptions) => {
return new HttpService(backend, options); },
  deps: [XHRBackend, RequestOptions]}
]
...

构建它时，我得到：

Error: Error encountered resolving symbol values statically. Function calls are
not supported. Consider replacing the function or lambda with a reference to an
exported function (position 63:39 in the original .ts file), resolving symbol Ap
pModule in ../angular/app/src/app/app.module.ts
at positionalError (..\angular\app\node_modules\@angular\compiler-c
li\src\static_reflector.js:595:18)

当我使用ng serve该应用程序时，没有任何问题。

我试图了解如何在另一个Promise中解决Promise.
我想要实现的步骤如下:

1. User通过UserManager(功能)获取其id
2. 改变它 firstName
3. User通过UserManager(功能)保存到数据库

我正在寻找测试成功UserManager.saveUser(user);回报的回应true.但是我收到了一个错误.

UserManagerTest.js

//[...]

it("Should save a user to the database", function () {
    var response = UserManager.getUserByLogin("Foo.Bar@provider.com", "Test")
        .then(function (user) {
            user.firstName = "Macarena";
            return UserManager.saveUser(user);
        })
        .catch((error) => {
            console.log("This error occured: "+error);
            return false;
        })
    return Promise.all([
        expect(response).to.eventually.be.true
    ]);
});

//[...]

控制台输出

  1) UserManager Save Should save a user to the database:
     AssertionError: expected undefined to be true
      at node_modules/chai-as-promised/lib/chai-as-promised.js:305:22
      at process._tickCallback …

我在firebase例程中有以下代码.收到通知时,如何将通知消息或数据显示为警报？我的服务器上的PHP代码成功地通过id将消息推送到Android设备,并且在收到消息时听到声音,但我想显示警报或转移到片段(我更喜欢警报).

public class MyFirebaseMessagingService extends FirebaseMessagingService
{
    private static final String TAG = "MyFirebaseMessService";

    @Override
    public void onMessageReceived(RemoteMessage remoteMessage)
    {
        commonfunc.myprint("#####_____MyFirebaseMessService_from 1 : " + remoteMessage.getFrom());


        if(remoteMessage.getData().size() > 0)
        {
            commonfunc.myprint("MyFirebaseMessService_getdata 2 : " + remoteMessage.getData());
            Map<String, String> data = remoteMessage.getData();
            String value1 = data.get("dtitle");
            String value2 = data.get("dbody");
            commonfunc.myprint("MyFirebaseMessService_getdata 2 : " + value1 + " " + value2);
            sendNotification(remoteMessage.getData().toString());
        }
        if (remoteMessage.getNotification() != null)
        {
            commonfunc.myprint("MyFirebaseMessService_getNot 3 body: " + remoteMessage.getNotification().getBody());
            commonfunc.myprint("MyFirebaseMessService_getNot 3 title: " + remoteMessage.getNotification().getTitle());

            sendNotification(remoteMessage.getNotification().getBody()); …